2210212121 has 8 divisors (see below), whose sum is σ = 2384786880. Its totient is φ = 2036288592.

The previous prime is 2210212097. The next prime is 2210212159. The reversal of 2210212121 is 1212120122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2210212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210212096 and 2210212105.

It is not an unprimeable number, because it can be changed into a prime (2210212421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155741 + ... + 169338.

It is an arithmetic number, because the mean of its divisors is an integer number (298098360).

Almost surely, 2^2210212121 is an apocalyptic number.

It is an amenable number.

2210212121 is a deficient number, since it is larger than the sum of its proper divisors (174574759).

2210212121 is a wasteful number, since it uses less digits than its factorization.

2210212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325615.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2210212121 is about 47012.8931358197. The cubic root of 2210212121 is about 1302.6007346172.

Adding to 2210212121 its reverse (1212120122), we get a palindrome (3422332243).

The spelling of 2210212121 in words is "two billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-one".